House of Spencer

The House of Spencer is the reigning royal house of the United Kingdom and the other Commonwealth realms. Founded in the 15th century, it has spawned numerous aristocratic titles including the extant dukedom of Marlborough, the earldoms of Sunderland and Spencer, and the Churchill barony.

The current head of the house is monarch of sixteen sovereign states. These are the United Kingdom (where they are based), Canada, Australia, New Zealand, Jamaica, Barbados, the Bahamas, Grenada, Papua New Guinea, Solomon Islands, Tuvalu, Saint Lucia, Saint Vincent and the Grenadines, Belize, Antigua and Barbuda, and Saint Kitts and Nevis. As well as these separate monarchies, there are also three Crown dependencies, fourteen British Overseas Territories and two associated states of New Zealand.

Since its conversion into a royal house in 1952, the House of Spencer has had one monarch: Joan.

List of members
Joan and her husband Roscoe founded the House of Spencer upon her ascension to the throne in 1952, and thus, the House of Spencer is the reigning royal house of the United Kingdom and other Commonwealth realms. The royal couple's children, Jacinda, Sophie, George, and Lawrence, are also members of the House of Spencer.